Feed grinder



April 1 5, 1930. T, TAMEN 1,755,037

7 FEED GRINDER Filed July 23, 1 928 2 Sheets-Sheet 1 MENTOR Zzznen,

TQTAMEN FEED GRINDER April 15, 1930.

,Filed July 23, 1928 2 Sheets-Sheet 2 Patented Apr. 15, 1930 PATIENT oFFic TOM PI'AMEN, or more, IOWA FEED GRINDER Application filed Ju1y'23, 1928. Serial lilo. 294,842.

This invention relates to feed grinders. An object of the invention is the provision of a grinder having a plurality of concentric rows of teeth projecting from oppositely disposed plates, the teeth movable in an inter-" fitted relation so that the feed passing through the interstices between the teeth will be thoroughly ground and ejected at the periphery of the disc.

A further object of the invention is the provision of a grinder for feed in which a pair of discs are mounted in spaced parallel relation with one disc moving relative to the other disc, each disc having a (plurality of teeth projecting laterally from one face and moving in interfitted relation with each other, the edges of the teeth on one disc being inclined in a direction which is opposite to the direct-ion of inclination-of the teeth on the other disc, said-teeth being arranged concentrically in sections which are grouped around each disc, with certain of the teeth in one section being located in staggered relation with the remaining teeth of the section. This invention will be best understood from a consideration of the following detailed description in connect-ion with the accompanying drawings; nevertheless, it is to ,be understood that the invention is not confined to the disclosure being susceptible of such changes and modifications as shall define no material departure from the salient features of the invention as expressed in the appended claim.

Inthe drawings Fi ure 1 is a side View in elevation of a grin er showing my invention applied thereto,

Figure 2 is a View in perspective of the 40\ grinder shown in detached relation,

Figure 3 is a section taken along the line 33 of Fig. 2,

Figure 4 is a fragmentary view in perspective of a section of one of the grinders,

Figure 5 is a plan View of one of the sections of the grinder,

Figure 6 is a fragmentary'vertical section of a pair of the grinders located in detached relation.

Referring more particularly to the drawtion 17 of the grinder is secured to the sleeve.

15, while a rotatable section 18 is connected with the outer end of the shaft 12 and revolved thereby.

Each grinding element consists of a ring 20 formedflof metal and divided into a Inrality of sections (in this case six in num er) and which is defined by the teeth 21. It will be noted that the outer concentric rows 22 of the teeth are arranged in a uniform manner around the circular plate 20, while teeth 23 and 24 are located in staggered relation with respect to the adjacent teeth 22.

Between each concentric row of teeth are provided grooves 25 which are adapted to re ceive the outer free ends 26 of the teeth on an adjacent plate.

It will be noted that the side edges 30 and 31 of the teeth of the plate 18 are inclined in an opposite direction to the side edges 32 and 33 respectively, of the plate 17, so that a plurality of cutting edges on the sets of teeth on both plates are presented towards each other in order to insure a maximum grinding of the feed passing through the teeth. Furthermore, the openings between the teeth at the inner periphery of each plate rovides means for receiving the feed which 1s adapted to be ground, and this feed is carried around through the grinding portion of the clrcumference while being continuously ground. 1

It will be noted that the grooves 25 have greater depth than the transverse grooves between the successive rows of the teeth.

,The object of this arrangement is to prevent the feed which is being ground from passing through the burrs past the ends of the teeth when the burrs are spread apart for coarse grinding. When the burrs are placed in close contacting relation, the feed will be ground very fine but as'the burrs are spread apart, the size of the openings between the teeth permits the feed to pass throu h the same at a (greater velocity. -It will a so be appreciate that the size of the o ning between the teeth gradually increa as the burrs are spread apart, but this increase of the openings or spaces between the teeth rapidly becomes eater as the burrs are moved outwardly rom each other, due to the m tapering of the teeth.

I claim A rinding device comprising. a pair of spaced discs having laterally projecting teeth in an interfitted relation, each disc 1 being divided uniformly into sections, saidteeth being arranged in concentric circles "with the teeth in each circle being uniformly spaced, each section having an initial series of teeth on each section being arranged in a straight line transversely of the concentric rows, the succeeding teeth in the innermost concentric rows bein disposed in staggered relation with the teet succeeding the initial series in the outer concentric rows, the leading edge of each tooth being sheared off at an angle.

TOM TAMEN. 

